posted by tracy10 on .
Can someone give me the formula to work this out, I am not sure.
Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.)
Sample Number Mean Std. Dev.
1 25 38.6 13.7
2 29 42.1 10.2